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3 years ago

Please answer these questions ASAP

Mathematics

1 answer:

djyliett [7]3 years ago

5 0

Answer:

Step-by-step explanation

Since k is constant, we can find k given any point by multiplying the x-coordinate by the y-coordinate. For example, if y varies inversely as x, and x =3 when y =11 , then the constant of variation is k = xy = 3(11) =33 . Which means the equation describing this inverse variation is xy =33 or y = 11.

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The graph shows the data of texting speed according to time.

hichkok12 [17]

The answer is B on edgeunity

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3 years ago

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In which choice do all three points lie on the

spin [16.1K]

Answer:

D (1, 2), (2, 4), (4,8)

Step-by-step explanation:

Points lying on the same line:

If three points lie on the same line, the change in y has to be always the same when x changes by 1.

А. (0, 1), (-1, 3), (1, 3)

(-1,3) to (0,1): x changes by 1, y by -2

(0,1) to (1,3): x changes by 1, y by 2

So these points are not on the same line.

B. (4, 2), (2, 1), (4, -2)

Two values for y when x = 4, so not on the same straight line.

C (0, 0), (8, 0), (0, 8)

Two values for y when x = 0, so not on the same straight line.

D (1, 2), (2, 4), (4,8)

Here, when x changed by 1(from 1 to 2), y changed by 2.

When x changed by 2(from 2 to 4), y changed by 2*2 = 4.

So these points are on a straight line, and D is the correct answer.

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3 years ago

Identify the range of the following numbers 7 9 15

Deffense [45]

8 is your range, 15-7= 8.

7 0

3 years ago

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MATH HELP PLEASE WILL GIVE BRAINLIEST!

Inessa05 [86]

Because AB=RS=8m, ArcRS=Arc AB=ArcAR+ArcRB=55+66=121

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3 years ago

some psychologists believe that a genius should be defined as anyone having an IQ over 140. If IQ scores are normally distribute

denis23 [38]

Answer:

61,239,550

Step-by-step explanation:

We let the random variable X denote the IQ scores. This would imply that X is normal with a mean of 100 and standard deviation of 17. We proceed to determine the probability that an individual chosen at random from the population would be a genius, that is;

Pr( X>140)

The next step is to evaluate the z-score associated with the IQ score of 140 by standardizing the random variable X;

$Pr(X>140)=Pr(Z>\frac{140-100}{17})=Pr(Z>2.3529)$

The area to the right of 2.3529 will be the required probability. This area from the standard normal tables is 0.009314

From a population of 6,575,000,000 the number of geniuses would be;

6,575,000,000*0.009314 = 61,239,550

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3 years ago

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